| 摘要 |
The cycle pedal gear enables the pedal cranks to extend, augmenting cycling effort. The cranks (5) slide in guide sleeves (4), fixed to the pedal crank rotational axis. The cranks may thus vary in length, applying differing leverage to the crank axis. A circular crown rail (7) may be positioned with its centre 7 cm in front of the crank axis. The crown rail may be 34 cm diameter, fixed to the cycle frame by two collars (1). Rollers (8) at pedal level (6) may roll on the rail, adjusting crank length, as pedals rotate. ADVANTAGE - Maximises cyclists effort, suiting the pedal crank length to the cyclists stature, for competition, pleasure or all terrain.
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